Truck-bolster for railway-cars.



No. 739,911. PATENTED SEPT. 29. 1,903.'-

S. OTIS.

`TRUCK HOLSTER FOR RAILWAY GAR-S. APPLIOATIONHLED AUG. 2o. 1902.

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UNITED .STATES Patented September 29, 1903. l

SPENCER Cris, or CHICAeo, ILLINOIS, AssIGNoR ro NATIONAL PATENT -HOLDING COMPANY, OF SOUTH-DAKOTA, OF RAPID CITY, SOUTH DA- KOTA, AND CHICAGO, ILLINOIS, A CORPORATION OF SOUTH DAKOTA.

1 TRUcK-BoLsTER Fo'RRAlLwAY-CARS.

SPECIFICATION forming part of Letters Patent No. 739,911, dated September 29, 1903. Application iiled August 29, 1902. Serial No. 121.435. (No model.)

To aJZZ whom t may concern.-

Be it known that I, SPENCER OTIS, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Truck-Bolsters for Railway-Cars, of which they following is a specification.

This invention relates to that class of bolsters which are used in the construction of trucks for railway-cars, and particularly to the specific construction thereof, all of which will more fully hereinafter appear.

The principal object of the invention is to provide asimple, economical, and -eicient bolster for a car-truck.

A further object of the invention is to provide a bolster for a car-truck with a journal at each end by lwhich it may be rotatably mounted in position. l

Further objects of the invention will appear from an examination of the drawings and the following description and claims.

The invention consists principally in a truck-bolster provided with abody portion having a cylindrical journal portion at each end.

The invention consists, further and nally, in the features combinations, and, details of construction hereinafter described and Claimed.

In the accompanying drawings, Figure lis a side elevation of a truck-bolster constructed in accordance with these improvements; Fig. 2, a plan view of the same, shown partly in section-and looking at it from above; Fig. 3, an enlarged cross-sectional view, taken on lin'e 3 of Fig. l, looking in the direction of the.

arrow; Fig. 4, a longitudinal sectional detail, taken on line 4 of Fig. 2, looking in the direction of the arrow; and Fig. 5, a cross-sec tional View of a modified for'rn of the construction shown in Fig. 3, in which the cylindrical journal-bearing portion is made continuous instead of in broken or semicylindrical portions, as shown in Fig. 3.

In the art to which this invention relates it is well-known that it is highly desirable to have a car-truck that will be of such construcv do not form any part of the invention.

In constructing a truck-bolster in accordance with these improvements I provide a main body portion a of the desired size, shape,

andl strength to support the superstructure in the desired manner. This body'portion is preferably made in the shape of a metallic I- beam, having web portions b, an 'upper ange o, and a lower anged, interposed strengthening-ribs e, and a central tubular portion f, through which the king-bolt passes.

vIn this particular improvement the truckbolster is provided with cylindrical journals g at each end, having flanges h on the outside and shoulders t' on theinner side of the bolster only, as shown particularly in Figs. I and 2. The journals of the bolster have their bearings in the side frames of a Car-truck in such a ma-nner as to allow such side frames to rock independently of each other while supporting the car and to assist in tying the truck-frame together.

The center bearing 7o, upon which the vusual body-bolster rests, is arranged .in the upper flange vof the bolster substantiallyat or near the axial center of the end journals, all of which tends to keep the bolsterin normal position and prevent rocking, which might otherwise occur if the seat were at any distance above the center. Integral side bearingslare also provided in the desired position.

I claim- 1. As a new article of manufacture, a Carbolster formed of metal having integral cylindrical journals at each end and a center bearing on the upper portion arranged substan- Lially at or near the axis of the cylindrical end flange thereof arranged at or near the axial journals, substantially as described. center of the cylindrical journals, substan- 2. As a new article of manufacture, a me'- loially as described. tallic truckcar bolster, a body portion formed SPENCER OTIS. 5 substantially I-shaped in cross-section and WVitnesscs: v

provided with integral cylindrical journals at HARRY I. CROMER, each end, and a center bearing on the upper ANNIE C. COURTENAY. 

